Comparative study of the tribological performance of internal geometry structures of 3D-printed PLA polymer

Mohd Zaki, Rukhmi Rulhi Hafiz (2021) Comparative study of the tribological performance of internal geometry structures of 3D-printed PLA polymer. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Additive manufacturing, often known as 3D printing, is the technique of creating threedimensional solid things from a computer file. Additive manufacturing methods are used to create 3D printed objects. An item is formed in an additive method by laying down successive layers of material until the entire object is completed. Each of these layers may be viewed as a horizontal cross-section of the final item, thinly cut. The advent of low-cost 3D printers has increased the popularity of additive manufacturing (AM), often known as 3D printing, for the creation of a variety of items. Selective laser sintering (SLS) and fused filament fabrication (FFF) are two common 3D printing techniques that employ polymeric materials as feedstock (Friedrich, 2018). Tribometry is the measuring of tribological system friction and wear using a tribometer. Tribometers are devices that are used to analyze the tribological characteristics of a material, such as friction, wear, adhesion, hardness, and other contact mechanics. The goal of this research is to determine the best settings for 3D printing based on the coefficient of friction and wear characteristics of the polylactic acid (PLA) polymer. Fused filament fabrication 3D printing was utilized to create the pin specimens. A comparative study on tribological properties of 3D-printed polylactic acid (PLA) pin with different internal geometries were carried out. The value of coefficient of friction (COF) and wear rate were the responses to be recorded. Both the value was obtained using two different software Minitab and Design-Expert. The value is then compared with the experimental value to determine which software is more accurate.

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